# US 5,703,345 A · Hydrostatic drive with data carrier control

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- Number: US 5,703,345 A
- Document ID: US5703345A
- Status: Granted
- Kind: A
- Application number: 08/619,011
- Filed: 1996-03-21
- Granted: 1997-12-30
- Earliest claimed: 1995-03-22
- Assignees: Sauer Inc.
- Inventors: Wilhelm Gollner; Manfred Maiers
- Web page: https://patentgrep.com/patent/US5703345A

## CPC

- F15B 21/02: Servomotor systems with program control derived from a store or timing device; Control devices therefor
- F15B: SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR

## Abstract

A control system for a hydrostatically driven vehicle comprises a hydraulic drive system having a hydraulic drive unit. An electronic control unit on the machine being driven is operatively connected to the hydraulic drive unit and is adapted to transmit and receive electronically data with respect to the drive unit. An external operator control unit is comprised of a data card inserted into a manual control means and is detachably connected to the electronic control unit. The data carrier card has an interface capable of transmitting data into and receiving data from the hydraulic drive unit to the electronic control unit. The data carrier card and the external operator control unit have memory capability.

## Claims

### Claim 1

A control system for a hydrostatic drive unit, comprising,
a hydrostatic drive system for propelling a wheeled machine,
said drive system having a hydraulic drive unit,
an electronic control unit on said machine operatively connected to said hydraulic drive unit, and being adapted to transmit and receive electronic data with respect to said hydraulic drive unit,
an external operator controlled unit detachably connected to said electronic control unit,
said operator controlled unit including a detachable data carrier card having an interface capable of transmitting data to and receiving data from said hydraulic drive unit through said electronic control unit.

### Claim 2 (depends on 1)

The device of claim 1 wherein said operator controlled unit has a visible display means for visibly reflecting the information transmitted to or from said hydraulic drive unit.

### Claim 3 (depends on 1)

The device of claim 1 wherein said operator controlled unit has manual controls wherein the operator can control the data being sent to or received from the hydraulic drive unit.

### Claim 4 (depends on 1)

The device of claim 1 wherein said data carrier card has an electronic connector which is detachably connected to said electronic control unit, and said data carrier card is detachably interfaced with an interface of a manually operated control means on said operator controlled unit.

### Claim 5 (depends on 1)

The device of claim 1 wherein said operator controlled unit is a hand held apparatus which is easily portable and mobile.

### Claim 6 (depends on 1)

The device of claim 1 wherein said hydraulic drive unit is of the open or closed loop.

### Claim 7 (depends on 2)

The device of claim 2 wherein said display means is capable of displaying graphic information.

### Claim 8 (depends on 2)

The device of claim 2 wherein said display means is capable of displaying alphanumeric information.

### Claim 9 (depends on 1)

The device of claim 1 wherein said external operator controlled unit has a memory means for storing data to be transmitted to said hydraulic drive unit.

### Claim 10 (depends on 1)

The device of claim 1 wherein said data carrier card is a chip card.

### Claim 11 (depends on 1)

The device of claim 1 wherein said data carrier card is a magnetic card.

### Claim 12 (depends on 3)

The device of claim 3 wherein said operator controlled unit has read and write access to said data carrier card.

### Claim 13 (depends on 1)

The device of claim 1 wherein data carrier card can electronically store data.